Community Profile # Karim

Last seen: Today Active since 2016

Mechanical Engineer

Programming Languages:
MATLAB
Spoken Languages:
English
Professional Interests:
Optimization, Multibody Modeling, Finite Element Analysis (FEA)

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Match numbers to allocate text
you can use the categorical command to do this: y = [12 13 19 24 21 12 12]'; B = categorical( y, [12 13 19 21], ["A" "B" "C"...

ongeveer 4 uur ago | 0

How to build a 3d map from raw data?
If you want to plot the curves in 3D, you can use the plot3 command. See below for an example: % read the data opts = spreadsh...

ongeveer 8 uur ago | 0

change the scale of colorbar
you can use the caxis command, simply add caxis( [0 0.02]) below the colorbar command. figure surf(rand(10,10)) c = colorbar;...

ongeveer 8 uur ago | 0

What is the syntax for iterating over given coordinates, using a For loop?
You can do this in the following way: X1 = [10 12 14 23 24 23 18 16 12 10]; Y1 = [20 20 18 15 8 7 8 6 12 20]; for i = 1:num...

6 dagen ago | 0

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How to convert strings in a table to numbers?
An easy method would be to use the third output of the unique command. This will work directly on strings and will give the core...

6 dagen ago | 1

Extract value from every struct
You can acces the data in the struct by placing a point after the variable name of the struct, follewed by the fieldname you wan...

6 dagen ago | 0

text file to be in the folder
No need for the save command, first create the folder (or check that it exists) and then you can write the file directly into th...

25 dagen ago | 0

How to create a triangular shape using following Code in MATLAB
Based on the scatter mentioned in you question I combined the two loops and the resulting points in a single grid. This allows t...

26 dagen ago | 0

Running my code in a loop to make it more efficient
You can create a for loop, and just save the variables directly into matrices, see below for an example with 10 iterations and 7...

27 dagen ago | 0

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Count impulses into sequence of impulses and segments of sequences of impulses from signal
If the rectangles were drawn using matlab, then you know the start and stop time. Thus, if this works for the total number of p...

27 dagen ago | 0

Rewrite the format of a string
In the for loop, 'x' starts from 1, hence you will overwrite the data in iwant for each new file. One method to resolve this is...

27 dagen ago | 0

how to draw Bipartite Matrices and Projection Matrices.
such figures can be generated with the spy command. See below for an attempt to produce the top left figure using a bit of rando...

28 dagen ago | 0

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Array indices must be positive integers or logical values.
The following part of you code can produce an error: i starts at 1, hence you are trying to acces t(0) which is not possible. In...

29 dagen ago | 1

Average of multiple matrices
This depends how your images are stored in memory, if they are stored in a 3D array you can use the mean function % generate 3...

ongeveer een maand ago | 0

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Vector question help?
% this step creates a vector with 25 normal distributed random values MyVector = randn( 1,25 ) % if you want to round these va...

ongeveer een maand ago | 0

Plot an equation in time span T=[0,t]
You need to create a vector, below you can see a method using the "linspace" function. This creates a vector between 0 and t wit...

ongeveer een maand ago | 0

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how to create random vector?
RandomDouble = rand(25,1) % i.e. pick 25 random values between 0 and 1 RandomIntegers = randi(1000,25,1) % i.e. pick 25 integer...

ongeveer een maand ago | 0

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If else -statement doesn't work
The easiest method will be to first create a zero array, and then fill in the values according to the required logic: % intiali...

ongeveer een maand ago | 1

calculate the volume obtained by rotating a function around the X-axis
Hello, since at first glance there are no internal voids you can use the convex hull function to determine the volume numericall...

ongeveer een maand ago | 1

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To concatenate single column of a cell array
You can use cell2mat to do this, see below for an example % generate cell array with random data C = cell( 3072 , 2); C = cel...

ongeveer een maand ago | 0

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How to use Matlab to solve equation like Mathcad
Use the symboic toolbox to determine the equations, see below. syms fp1 fp2 fz1 fz2 fc boost real eqn = boost == ( atan(fc/fz1...

ongeveer een maand ago | 0

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Error in writing the output to excel file
As indicated in the error message you need to convert the sym into a double or a string, see below for both options syms m1 m2 ...

ongeveer een maand ago | 0

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Trying to find the corresponding value of a matrix with an input?
see below for the interpolation fig = openfig('VelocityAgainstRodHeight500Hz.fig'); axObjs = fig.Children; dataObjs = axObjs....

ongeveer een maand ago | 1

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How introduce a delay of one second in MATLAB?
you can use the "pause" function, this will pause matlab for the given amount of time pause(1)

ongeveer een maand ago | 0

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create a sparse multidimensional matrix
you can either fill it in directly or use blkdiag to create this shape: % direct method % on row 3 7 and 11, column 1 2 3 resp...

ongeveer een maand ago | 0

How to define if a point is inside or outside a 3D pyramidal area?
Hi, asuming you want to use as many standard matlab functions, the easiest method i can think is by constructing two terahedrond...

ongeveer een maand ago | 1

How can I create a quadratic matrix with variables?
you do not need to use .' in this case, only use the transpose operator: syms q1dot q2dot q3dot q4dot q5dot real qdot= [q1dot...

ongeveer een maand ago | 0

Frequency words for each labels
Edit to make so that the code works with the latter added example data... % read the file data = readtable("dati_classificat...

ongeveer een maand ago | 1

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